SMD All-Solid-State Battery Stacked Electrode Design
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Solution Overview
Problem
Conventional all-solid-state batteries require miniaturization and ease of mounting on printed circuit boards for applications in IT, IoT, and small household appliances, while maintaining high capacity, which existing technologies have not adequately addressed.
Innovation Solution
A high-capacity SMD-type all-solid-state battery is developed by sequentially stacking and pressing positive electrode sheets, negative electrode sheets, and electrolyte sheets, with buffer sheets formed at the interfaces to enhance capacity and facilitate small-sized surface mount device manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the all-solid-state battery is miniaturized for SMD-type applications, then it can be easily mounted on printed circuit boards for IT, IoT, and small household appliances, but the battery capacity is reduced
Solution Approach 1:
The battery is divided into multiple thin layers (positive electrode layer, negative electrode layer, solid electrolyte layer) that are stacked sequentially. This segmentation allows the battery to maintain a compact SMD form factor while maximizing the active material content within the limited volume, thereby preserving capacity despite miniaturization.
Solution Approach 2:
The patent employs a multi-layer nested structure where electrode layers and electrolyte layers are stacked alternately. This nesting approach allows maximum utilization of the available space in the miniaturized battery, with each layer contributing to the overall capacity without increasing the external dimensions.
2Quantity of substance
If the all-solid-state battery is manufactured in a multi-layer stacked structure, then it achieves high capacity, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the positive electrode, negative electrode, and solid electrolyte into a single integrated multi-layer stack. This merging of components into one compact structure simplifies the overall manufacturing process compared to assembling separate battery cells, while still achieving high capacity through the stacked configuration.
Solution Approach 2:
The electrode and electrolyte layers are prepared in advance as separate thin sheets with controlled compositions, then stacked and pressed in a sequence. This preliminary preparation of individual layers simplifies the manufacturing process by allowing standardization of each layer before final assembly, reducing the complexity of the overall production.
Data Source
AI summary
Provided is a high-capacity SMD-type all-solid-state battery comprising: a stacked press body; a first external electrode formed on one side of the stacked press body; and a second external electrode formed on the other side of the stacked press body, wherein the stacked press body includes: a plurality of positive electrode sheets sequentially stacked and pressed so that an end of one side of each is connected to the first external electrode; a plurality of negative electrode sheets positioned between the positive electrode sheets crosswise with respect to the positive electrode sheets, and sequentially stacked and pressed so that an end of the other side of each is connected to the second external electrode; and a plurality of electrolyte sheets positioned between the positive electrode sheets and the negative electrode sheets and sequentially stacked and pressed.